Synergistic Activity of Plant Extracts with Microbial Cellulases for the Release of Free Sugars

Hayden, Celine; Fake, Gina; Carroll, Jennifer; Hood, Elizabeth; Howard, John
June 2012
BioEnergy Research;Jun2012, Vol. 5 Issue 2, p398
Academic Journal
Agricultural lignocellulosic waste such as corn stover is a potential source of inexpensive, abundant, and renewable biomass for the production of bioethanol. The enzymatic process for the economically viable breakdown of cellulose to ethanol relies on the availability of inexpensive microbial cellulases. Although the cost of cellulase has decreased in recent years, current costs still preclude the production of economically viable bioethanol from lignocellulose. Substantive efforts in this lab are being directed to transgenic production of cellulases in maize in order to boost efficiency both of production of enzymes and degradation of corn stover. We serendipitously observed that the addition of non-transgenic maize seed extracts to cellulose and microbial enzymes potentiated free sugar release by as much as 20-fold. Further, this synergistic effect between cellulase enzymes and extract was seen with a variety of plant species and tissue extracts, but varied in efficiency, and was optimal at low concentrations of cellulases. Although the nature of the synergistic molecule is not known, the use of extracts to potentiate cellulose breakdown provides opportunities for a clearer mechanistic understanding of the degradation process as well as an economical way to improve the efficiency of cellulases to produce more cost-effective bioethanol from agricultural waste.


Related Articles

  • Too many biofuel plants ahead?  // Irish Farmers Monthly;Mar2007, p44 

    The article reports on the impact of the expansion of biofuel plants on the status of the industry in the U.S. According to economist Chris Hurt, the industry will collapse if the price of corn will increase and the ethanol plants cannot make up the losses. The ethanol expansion is going to bid...

  • The impact of cell wall acetylation on corn stover hydrolysis by cellulolytic and xylanolytic enzymes. Selig, Michael J.; Adney, William S.; Himmel, Michael E.; Decker, Stephen R. // Cellulose;Aug2009, Vol. 16 Issue 4, p711 

    Analysis of variously pretreated corn stover samples showed neutral to mildly acidic pretreatments were more effective at removing xylan from corn stover and more likely to maintain the acetyl to xylopyranosyl ratios present in untreated material than were alkaline treatments. Retention of...

  • Cellulosic Ethanol From Corn Stover. Perry, Ann // Agricultural Research;Oct2008, Vol. 56 Issue 9, p14 

    This article presents information about the use of corn stover, or crop residue left after the harvest, in the production of biofuel. Corn stover contains cellulose, but it is currently left on cornfields to prevent erosion and to restore nutrients to the soil. Researchers are examining ways to...

  • Technoeconomic analysis of the dilute sulfuric acid and enzymatic hydrolysis process for the conversion of corn stover to ethanol. Aden, Andy; Foust, Thomas // Cellulose;Aug2009, Vol. 16 Issue 4, p535 

    Technoeconomic analysis has been used to guide the research and development of lignocellulosic biofuels production processes for over two decades. Such analysis has served to identify the key technical barriers for these conversion processes so that research can be targeted most effectively on...

  • Food for Fuel? Daschle, Tom // Foreign Affairs;Sep/Oct2007, Vol. 86 Issue 5, p157 

    The article presents a response to the article "How Biofuels Could Starve the Poor," by C. Ford Runge and Benjamin Senauer that was published in the May/June 2007 issue, igniting a debate on the tradeoffs of using corn-based ethanol. It is the view of both Senauer and Runge that the use of corn...

  • PRODUCTION STUDIES/CHEMICAL PROCESSES.  // Biomass Bulletin;2007, Vol. 26 Issue 2, p38 

    The article presents abstracts of articles on the subject of production studies/chemical processes including saccharification and fermentation of softwood for ethanol production, ethanol production from wheat straw, and corn stover fractions and bioenergy.

  • THINK TANK.  // ICIS Chemical Business;6/11/2007, Vol. 2 Issue 70, p50 

    The article emphasizes the need for biofuel advocates to reconsider the production of ethanol from biomass, predominantly from corn, in the U.S. Producers expect an increase in food prices as a result of turning fields over fuel production. According to the Grocery Manufacturers Association, the...

  • Corn Power.  // Weekly Reader - Edition 2;Oct2007, Vol. 77 Issue 2, Special section p2 

    The article reports an increase in the demand for corn. The increased demand can be attributed to the increasing environmental significance of the fuel called ethanol. According to National Corn Growers Association spokesperson Nick Weber, oil and ethanol are used to make gasoline for cars, but...

  • Obama Snubs Appeals for U.S. Food; Demands Still More Bio-Products. Baker, Marcia Merry // Executive Intelligence Review;9/21/2012, Vol. 39 Issue 37, p18 

    The article focuses on the rejections of the all proposed appeals related to lifting of the Federal mandate for biofuel in order to protect the food supply. It states that the U.S. President Barack Obama has rejected the appeals concerning food supply in the U.S. It also mentions that the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics